Furnace



(No Model.)

W. R. RONEY.

FURNAGE.

No. 409,650. Patented Aug. 20, 1889.

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UNITED STATES PATENT EEicE.

IILLIAM R. RONEY, OF CHICAGO, ILLINOIS.

FURNACE.

SPECIFICATI-I forming part of Letters Patent No, l09,650, dated August 20, 1889.

Application iiled April l, 1889. Serial No. 305,526. (No model.)

Tovctll whom zit 11mg/ con/cern,.-

le it known that I, IVILLIAM R. RONEY,

of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in that class of devices for feeding fuel to furnace-fires known as mechanical stokers.77

It has .for its primary object to secure a more perfect Cokin g of the coal or screenings on its Way to the fire proper, together with a more perfect combustion of the gases emitted by the fuel, and therefore greater economy in the consumption of the fuel and less waste in the form of smoke or soot.

The invention embraces more particularly improvements in devices for advancing' the fuel from the magazine to and along' the grates, whereby the supply of fuel is rendered regular and continuous.

Therinain features of construction herein illustrated are shown and claimed in a separate application for patent, Serial No. 2li-,304, filed September 23, 185413, the present application covering certain features of construetion shown, but not claimed, in said prior application.

In the accompanying drawings,illustrating my invention, Figure l is a central vertical longitudinal section of a furnace-grate containing my improvement with adjacent parts of a stcanrboiler furnace. Fig. 2 Ais an enlarged sectional view more fully illustrating` certain parts shown in Fig. l. Fig. 3 is aview similar to Fig. 2, showing the same parts in a changed position.

In the said drawings, A indicates the side wall of the iire-box, I3 the front wall thereof, and. C the rear or bridge wall.

I.) is a dropping or dumping grate located at the rear part of. the fire-box.

E is an inclined `grate located in front of and arranged to deliver upon the grate I), and F is an external hopper or magazine situatcd in position for the delivery of its contents upon the upper end of the inclined. grate lower the gratee E through a passage f in the front wall B of the fire-box. l

G is an angular plate situated at the bottom of the passage and extending over the uppermost bar of the grate E.

Il is a fire-brick hood or arch overhanging the upper portion of the grate E and extending v rearwardly and downwardly from the front wall of the fire-box above the passage f. The grate E composed of a series of rocking transverse bars e e, resting at their ends e in notches e2 provided in the upper edges of stationary inclined supporting-bars E. The upper surfaces of the Vgrate-bars e are broad, flat, and continuous or nondingered, and said hars are arranged in a stepped and overlapping position, se that the rear edge of one bar projects over the front edge of a suhjacent bar, sufficient vertical space being provided between the overlapping edges to allow a rocking movement, such as is desirable or necessary to insure the proper feed` ing of the fuel thrown from front te rear of the grate.

The grate-bars c c are severally provided with depending arms e3, which are engaged with a reciprocating rod or bar E2, by the movement of which the gratebars c e maybe rocked on their bearings in the bars l. In the present instance thc uppermost and lowermost gratebars are pivoted at c5 to the bar E2, thus upholding the latter, and the arms of the intermediate grate-bars merely engage notches e" in said bar E2. Other forms et' en gagement may of course be employed, if preferred. The rocking'movement of the bars e is adjusted to bring the upper faces `thereof at one extremity of their movement into a substantially horizontal position, as shown in Fig. 3, and at the opposite extremity of their throw into the inclined position shown in Fig. 2.

The [grate D is preferably made with itsbars running from front to rear, and is constructed to drop at its front edge, when desired. Said grate D is pivotally supported at d, and is provided near its forward edge with a depending arm D', to thelower edge of whch is pivoted a rod C2, extending to the front of the aslnpit, hy which the fireman may lift and Said operating-rod Cgis pr0- IOO vided with one or more hooks or teeth, which may engage an edge of the front plate, through 'which the rod passes for holding the grate in its horizontal operative position. Said grate D herein illustrated is constructed in the manner shown and claimed in a prior application, Serial No. 278,592, tiled June 29, 1888, and in itself forms no part of this present invention.

Vhen the connecting-bar E2 is reciprocated, it is obvious that coal or screenings or other fuel placed upon the inclined grate E will be intermittingly carried along down the same in the progress of its combustion, and finally deposited upon the grate D in the manner clearly stated in said prior application, Serial No. 214,304.

The lower part of the magazine or hopper F is provided with an inwardly and outwardly movable front piece, follower, or pusher F, hinged to the ends of the hopper at f. To the lower part of this pusher is loosely attached a bottom plate F2, which shares the inward and Outward movement of the pusher and which forms a sliding bottom of the magazine. rlhe inner edge of the bottom plate F2 in this instance rests and slides upon the horizont-al portion g of the fixed plate G, and when the plate F2 is retracted said horizontal part g forms a continuation thereof and a part of the bottom of the hopper. The bottom plate F2 is shown as conveniently connected with the pusher Y by engaging pins f4 in an inwardlydirected flange f2, which pins are inserted loosely through holes in the bottom plate. These parts operate in the same manner as described in said prior application, Serial No. 214,304, to allow the fuel or screenings to fall into the lower part of the hopper when the pusher is retracted and to force the fuel inwardly upon the inclined grate when the pusher is advanced.

J is a rotating horizontal shaft supported in bracketsj beneath the hopper. Upon the said shaft J is attached an eccentric or crank disk J This crank-disk or eccentric is connected by a rod j with a vibrating vertical arm J2, which is here shown as pivoted at its upper end to an outwardly-projecting lug J 2 upon the pusher F', but which may be pivoted elewhere. The reciprocating bar E2 is connected with the arm J2 at a suitable point by means of a connecting-rod E2, which desirably passes through a slot in the arm J2, and is provided with nuts e e7 on Opposite sides of said arm for adjustment of the throw of the grate-bars or to allow for lost motion between said bars and their actuating devices, if desired. By means of these movable nuts on the rod Es the grate-bars may be given a variable range Of oscillation, or they may be oscillated between variable initial and terminal positions, according to the requirements of the particular kind of coal that is being used. By the same devices of course the period of time in which the grates are allowed to remain without motion may also be varied by variation of the space between the nuts.

The rod E3 is herein shown as provided with a sleeve E4, interposed between the nuts e6 e7 around the rod E2 to take the wear resulting from the rubbing contact with the lever J2 in the manner described in said prior application, Serial No. 278,592.

A screw J 4 is secured to the pusher F and is provided with a hand-wheel J 5, and passes through a slot or opening in the said arm J2, so that the hub of the hand-wheel bears against the outer surface of the arm. A lug or projection y2 on the lower end of the pusher bears against the innersurface of said arm J 2. Said screw J4 serves as a means of detachaly securing the arm J2 to the pusher, so that the latter will move with the arm when vibrated, and the hand-wheel J 5 affords a means of adjusting the extent to which said pusher is moved through the medium of the reciproeatin g arm.

By varying the speed of the shaft J, when the latter is run by power, any desired rapidity of fuel supplied to the grates may be obtained, as fully set forth in said prior application, Serial No. 214,304.

I claim as my invention- 1. The combination, with the rocking gratebars and reciprocating bar connected therewith, of an oscillating part or arm having a uniform rangeof movement and a rod connecting the reciprocating bar with the said oscillating part or arm and havin g adjustable connection with the latter, whereby the bars may be given a variable range of oscillation, substantially as described.

2.` The combination, with the rocking gratebars and reciprocating bar E2, connected therewith, of a power-vibrated bar J2, having a uniform range of movement and provided with an aperture, and a connecting-rod attached to said reciprocating bar, passing through the apertu rc in the vibratin g arm, and

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